The main protagonist of the series. Sam is the lead guitarist of a teen rock band called Team Samurai. In a freak accident with his personal computer, Sam gains the ability to transform into a cybernetic superhero Servo, a guardian tasked with saving the world from the evil digital menace Kilokhan.

* ChivalrousPervert: Despite his heroism, Sam is not above G-rated sexual deviance.* FinishingMove: Grid Power!* TheHero* IJustWantToBeNormal: Sam goes through this when he bemoans his slipping grades, lack of time with his band and girlfriend.* WeaponOfChoice:** AnAxeToGrind: One form of both sword and shield combined.** CoolSword: Sheathed inside the shield when not in use.** GoodOldFisticuffs: Servo mostly engages in unarmed combat.** LuckilyMyShieldWillProtectMe: The default mode of all of Servo's melee weapons.* WakeUpGoToSchoolSaveTheWorld

!!Tanker/Tracto->[-Played by: Kevin Castro-]

Team Samurai's drummer and the school's best player on the football team. Tanker is eager for a good battle and a good meal. When not fighting, drumming, or eating, he longs to be with Sydney.

* BigEater: Lack of food will drive him crazy.* BookDumb: Tanker isn't by any means stupid, but grades are not one of his priorities.* TheLancer* LovableJock: One of nicest athletes in school. He only becomes a JerkJock where Malcolm is concerned. However, Malcolm deserves whatever Tanker wants to dish out.* NoLastNameGiven* ReluctantHero: When Sam is unavailable to be Servo, Tanker does not feel up to the task.* TankGoodness* UnresolvedSexualTension: With Sydney

* NiceHat: Constantly wearing hats that were in style at the time.* TheSmartGirl* TheSmurfettePrinciple* ThisIsADrill: Her main weapon as Borr.* TomboyishName

!!Amp/Vitor I->[-Played by: Troy Slaten-]

Bass player and a total space case.

* CloudCuckooLander* CoolPlane* HiddenDepths: Despite his outlandish non-sequiturs, Amp can be very insightful.* PutOnABus* TeacherStudentRomance: He develops a one-sided crush on a teacher, but nothing of this crush is ever mentioned again.

!!Lucky London/Vitor II->[-Played by: Rembrant-]

Amp's replacement with a love for surfing.

* DumbBlonde: Male variant.* CoolPlane* SuspiciouslySimilarSubstitute: He receives no formal introductory episode. He just shows up when Team Samurai needs another person like Amp.* SurferDude

!Villains!!Kilokhan->[-Voiced by: TimCurry-]

The main villain of the show. Kilokhan is a rogue military artificial intelligence hell bent on ruling the world. He uses his powers to bring Malcolm's drawings to life as Mega Virus Monsters to wreck havoc on the digital world.

* BadAssBaritone: Tim Curry at his best, folks. * BigBad * CoolAndUnusualPunishment: Kilokhan has come up with various creative but non-lethal punishments for Malcolm whenever one of his viruses is destroyed. These have ranged from hypnotizing Malcolm to confess that he's been cutting class and getting detention to ''zapping all of Malcolm's hair off''. * CreativeSterility: Despite his powers, he lacks the creative abilities to design and program viruses. Hence he needs Malcolm to design the viruses for him. * EvilLaugh* EvilOverlord: Of the digital world as he always proclaims.* NonActionBigBad: He does nothing more than bark orders at Malcolm, bring monsters to life, and curse at Servo...[[spoiler:right up until he personally engages Servo and shows just how lucky Team Samurai is that he's never tried to fight them personally before now.]] * VerbalTic: After an EvilLaugh, he will sometimes utter a phrase appropriate to the situation. * VileVillainSaccharineShow

!!Malcolm Frink->[-Played by: Glen Beaudin-]

A classmate from Sam's school. Malcolm is lonely kid who wears black and has artistic talent. When he and Kilokhan form an alliance, Malcolm uses Kilokhan's abilities to bring his monsters to life to make others miserable.

* EvilIsPetty: Much to Kilokhan's chagrin.* TheRival: He competes for Sam's girlfriend Jennifer.* LonersAreFreaks: He's often treated as such by the other characters, which gives him some basis for his bitterness. * MadArtist: He's not insane, but he's bitter, withdrawn and antisocial. He's also a very talented sketch artist. * VileVillainSaccharineShow: Less so than Kilokhan. It becomes horrific when you realize that any 21st century teen who exhibits the same kind of behavior as Malcolm does is not to be taken lightly.* [[spoiler:YouHaveOutlivedYourUsefulness: Once Kilokhan has Team Samurai at his mercy, he no longer needs Malcolm.]]